package com.jiaai.cloud.base.util;

import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import java.io.*;
import java.net.ConnectException;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class HttpClientUtil {  
	private static Logger log=org.slf4j.LoggerFactory.getLogger(HttpClientUtil.class);
    private static PoolingHttpClientConnectionManager cm;  
    private static String EMPTY_STR = "";  
    private static String UTF_8 = "UTF-8";  
  
    private static void init() {  
        if (cm == null) {  
            cm = new PoolingHttpClientConnectionManager();  
            cm.setMaxTotal(50);// 整个连接池最大连接数  
            cm.setDefaultMaxPerRoute(5);// 每路由最大连接数，默认值是2  
        }  
    }  
  
    /** 
     * 通过连接池获取HttpClient 
     *  
     * @return 
     */  
    private static CloseableHttpClient getHttpClient() {  
        init();  
        return HttpClients.custom().setConnectionManager(cm).build();  
    }  
  
    /** 
     * 发送get请求
     * @param url 
     * @return 
     */  
    public static String httpGetRequest(String url) {  
        HttpGet httpGet = new HttpGet(url);  
        return getResult(httpGet);  
    }  
  
    /**
     * 发送get请求
     * @param url
     * @param params
     * @return
     * @throws URISyntaxException
     */
    public static String httpGetRequest(String url, Map<String, Object> params) throws URISyntaxException {  
        URIBuilder ub = new URIBuilder();  
        ub.setPath(url);  
        
        List<NameValuePair> pairs = covertParams2NVPS(params);  
        ub.addParameters(pairs);
        
       
  
        HttpGet httpGet = new HttpGet(ub.build());  
        return getResult(httpGet);  
    }  
    /**
     * 发送get请求
     * @param url
     * @param params
     * @return
     * @throws URISyntaxException
     */
    public static String httpGetRequest(String url, Map<String, Object> headers, Map<String, Object> params)  
            throws URISyntaxException {  
        URIBuilder ub = new URIBuilder();  
        ub.setPath(url);  
  
        ArrayList<NameValuePair> pairs = covertParams2NVPS(params);  
        ub.setParameters(pairs);  
  
        HttpGet httpGet = new HttpGet(ub.build());  
        for (Map.Entry<String, Object> param : headers.entrySet()) {  
            httpGet.addHeader(param.getKey(), String.valueOf(param.getValue()));  
        }  
        return getResult(httpGet);  
    }  
    
    /**
     * 发送pos请求
     * @param url
     * @return
     */
    public static String httpPostRequest(String url) {  
        HttpPost httpPost = new HttpPost(url);  
        return getResult(httpPost);  
    }  
    /**
     * 发送pos请求
     * @param url
     * @return
     */
    public static String httpPostRequest(String url, Map<String, Object> params) throws UnsupportedEncodingException {  
        HttpPost httpPost = new HttpPost(url);  
        ArrayList<NameValuePair> pairs = covertParams2NVPS(params);  
        httpPost.setEntity(new UrlEncodedFormEntity(pairs, UTF_8));  
        return getResult(httpPost);  
    }  
    /**
     * 发送pos请求
     * @param url
     * @return
     */
    public static String httpPostRequest(String url, Map<String, Object> headers, Map<String, Object> params)  
            throws UnsupportedEncodingException {  
        HttpPost httpPost = new HttpPost(url);  
  
        for (Map.Entry<String, Object> param : headers.entrySet()) {  
            httpPost.addHeader(param.getKey(), String.valueOf(param.getValue()));  
        }  
  
        ArrayList<NameValuePair> pairs = covertParams2NVPS(params);  
        httpPost.setEntity(new UrlEncodedFormEntity(pairs, UTF_8));  
  
        return getResult(httpPost);  
    }  
  
    private static ArrayList<NameValuePair> covertParams2NVPS(Map<String, Object> params) {  
        ArrayList<NameValuePair> pairs = new ArrayList<NameValuePair>();  
        for (Map.Entry<String, Object> param : params.entrySet()) {  
            pairs.add(new BasicNameValuePair(param.getKey(), String.valueOf(param.getValue())));  
        }  
  
        return pairs;  
    }  
  
    /** 
     * 处理Http请求 
     *  
     * @param request 
     * @return 
     */  
    private static String getResult(HttpRequestBase request) {  
        // CloseableHttpClient httpClient = HttpClients.createDefault();  
        CloseableHttpClient httpClient = getHttpClient();  
        try {  
            CloseableHttpResponse response = httpClient.execute(request);  
            // response.getStatusLine().getStatusCode();  
            HttpEntity entity = response.getEntity();  
            if (entity != null) {  
                // long len = com.jiai.cloud.entity.getContentLength();// -1 表示长度未知
                String result = EntityUtils.toString(entity);  
                response.close();  
                
                // httpClient.close();  
                return result;  
            }  
        } catch (ClientProtocolException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        } finally {  
  
        }  
  
        return EMPTY_STR;  
    }  
  
    /**
     * 发送https请求
     * 
     * @param requestUrl 请求地址
     * @param requestMethod 请求方式（GET、POST）
     * @param outputStr 提交的数据
     * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
     */
    public static JSONObject httpsRequest(String requestUrl, String requestMethod, String outputStr) {
        JSONObject jsonObject = null;
        try {
            // 创建SSLContext对象，并使用我们指定的信任管理器初始化
            TrustManager[] tm = { new MyX509TrustManager() };
            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
            sslContext.init(null, tm, new java.security.SecureRandom());
            // 从上述SSLContext对象中得到SSLSocketFactory对象
            SSLSocketFactory ssf = sslContext.getSocketFactory();

            URL url = new URL(requestUrl);
            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
            conn.setSSLSocketFactory(ssf);
            
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            // 设置请求方式（GET/POST）
            conn.setRequestMethod(requestMethod);

            // 当outputStr不为null时向输出流写数据
            if (null != outputStr) {
                OutputStream outputStream = conn.getOutputStream();
                // 注意编码格式
                outputStream.write(outputStr.getBytes("UTF-8"));
                outputStream.close();
            }

            // 从输入流读取返回内容
            InputStream inputStream = conn.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            String str = null;
            StringBuffer buffer = new StringBuffer();
            while ((str = bufferedReader.readLine()) != null) {
                buffer.append(str);
            }

            // 释放资源
            bufferedReader.close();
            inputStreamReader.close();
            inputStream.close();
            inputStream = null;
            conn.disconnect();
            jsonObject = JSONObject.parseObject(buffer.toString());
        } catch (ConnectException ce) {
        	log.error("连接超时：{}", ce);
        } catch (Exception e) {
            log.error("https请求异常：{}", e);
        }
        return jsonObject;
    }
}  